Question

To the nearest whole number, what is the surface area of a sphere with a volume of 140 cm3?

Answer 1

V=4/3pir^3

Answer 2

140=4/3pir^3

3/4*140=r^3

Answer 3

{x=-2.358846990158267+4.085642834235041*i, x=-2.358846990158267-(4.085642834235041*i), x=4.717693980316533} is what my calculator got lol

Answer 4

wait what?

Answer 5

Yeah lol, no idea

Answer 6

alright so

\[V=\frac{4}{3}\pi r^3\]

if you know V = 140

\[140=\frac{4}{3}\pi r^3\]

multiplying by the reciprocal

\[.75*140=\pi r^3\]

\[105=\pi r^3\]

divide by pi and take the cube root to find an aproximate radius

Answer 7

Thanks!